Notes on the Fauna of the Chipola Formation- XX a Second Species of Petricola (Petricoxenica) (Mollusca: Bivalvia)

Abstract

While the writer's recent (Vokes, 1976) description of the new petricolid subgenus Petricola (Petricoxenica) and its Pliocene type species, P.(P.) concoralla, was in press, a collecting trip was made to the type area of the Chipola Formation in Calhoun County, Florida. At that time a large head of a poritid coral was secured that contained numerous  boring and nestling bivalve species, one of which proved to be a second species of Petricoxenica. This find prompted a careful examination of the extensive Tulane Chipola collections and four more valves were found, representing three additional localities. This new species, from strata of late lower Miocene (Burdigalian) age, is here described.